The metadata below describe the original scanning. Follow the "All Files: HTTP" link in the "View the book" box to the left to find XML files that contain more metadata about the original images and the derived formats (OCR results, PDF etc.). See also the What is the directory structure for the texts? FAQ for information about file content and naming conventions.
Tables giving the times of rising and setting of the sun and moon are to be included in the American ephemeris and nautical almanac and the American nautical almanac beginning with the editions for 1919. of. "Preface," p. 3